Means for removing scrap from sheet-metal stampings.



1 1 22,666, Patented Dec. 29, 1914.

2 SHEETSSHBET 1.

THE NORRIS PETERS c0.v FHOTO-LITHO.. WASHINGTON. D C

S. TIMINGS.

MEANS FOR REMOVING SCRAP FROM SHEET METAL STAMPI NGS. APPLICATION FILED um. 27, 1914.

1,122,666. I Patented Dec. 29, 1914.

L 2 E&TSSHEET 2. 5, I \v 3 &\\\ m m 4 MZ7Z5$65 Jwmerfir W W7 M .,,7 I I JIM)??? $4 HE NORRIS PETERS CO. PHOTO-LITHO WASHINGTON. D c

A uni SAMUEL TIMINGS, 0F BIRMINGHAM, ENGLAND.

MEANS FOR REMOVING SCRAP FROM SHEET-METAL STAMPINGS.

1,122,cee.

Specification of Letters Patent.

Patented Dec. 29, 1914.

Application fiied January 27, 1914.. Serial No. 814,629.

-England, have invented new and useful Improvements in Means for Removing Scrap from Sheet-Metal Stampings, of which the following is a specification.

This invention has reference to improved means for removing scrap from hollow sheet metal stampings which scrap is surplus metal and which as is well known forms a flange around the margin of the stamping and has to be clipped off or otherwise removed. Heretofore for this purpose it has been customary to employ a pair of top and bottom clipping tools, the bottom tool having a gap or opening corresponding in shape and size with the finished stamping without the scrap and having a cutting edge all around the top, while the top tool is made in the fo m of a punch also with a cutting edge and of the proper shape and size to fit into the bottom tool so that the flanged stamping having been placed on the bottom tool the flange or scrap metal is cut or clipped off all around the stamping by the action of the top tool forcing the stamping into the recess in the bottom tool. Each pair of top and bottom clipping tools can only be used for clipping stampings of the same shape and size, and it therefore follows that sheet metal stampers and piercers have to keep in stock a very large number of various pairs of clipping tools.

Now my invention is directed to provide means for removing the scrap flange or surplus metal from hollow sheet metal stampings without employing any clipping tools so that the cost of making such clipping tools is thereby saved. The appliance which face of the saw which is farther from the surface plate or table there is a gage collar or its equivalent so arranged that the periphery of the saw projects beyond the gage collar or its equivalent. The flange of scrap metal is removed from the hollow sheet metal stamping by the stamping being laid face downward on the surface plate or table and pressed up against the periphery of the revolving saw so that the flange will then pass between the face of the saw and the table and the periphery of the saw will saw into the edge or rim of the sheet metal stamping close to the flange and as the stamping is moved along and turned around the whole of the flange will ultimately be removed leaving the sawed edge of the stamping substantially flat and le el. The said gage collar or its equivalent gages thedistance which the saw proiert's th ough the inner side of the rim of the stamp ng.

The gage collar against wh ch the edge of the stamping is pressed while the saw is removing the scrap is preferabl mounted loosely on the clamping collar of the saw so as not to revo e with the saw but to be merely re olved by the friction of the pressure of the stamping against the periphery of the gage collar.

My invention is illust ated by the accompanving drawings of wh ch Figure 1 is a plan of a hollow sheet metal ink-stand stamping showing the flange of scrap metal around it which is to be removed: Fig. 2 is a sectional elevation of the samezFig. 3 is a cross sectional elevation of the same; Fig. 4 is a sectional elevation of the same, with the flange of scrap metal, having been removed therefrom by the saw; Fig. 5 is a plan of the same ink-stand stamping with the flange of scrap metal removed and this latter is shown separately in Fig. 6; Fig. 7 is a sectional front elevation of an appliance constructed in accordance with this invention for sawing olf the inner or outer flanges of scrap metal as aforesaid. Fig. 8 is a sectional side elevation of the same; Fig, 9 is a plan of the same; Fig. 10 is a sectional elevation of parts of the same on an enlarged scale so as to show the action of the saw. and the methodof mounting the same; Fig. 11 is a sectional side elevation of a slightly modified arrangement of my invention adapted for those stampings in which some part of the stamping projects below the scrap flange; Fig. 12' is a sectional elevation of portions of a further slightly modified arrangement of the said appliance; and Fig. 13 is a plan of the same.

1 is the circular saw which is mounted on a half cross belt or the like from a pulley on a lay shaft.

The plane of the saw 1 is parallel with the plane surface 3 of the table 4 and the distance between the underside of the saw 1 and the face 3 of the surface plate or table is slightly greater than the thickness of the flange 9 of scrap metal which is to be removed, as for instance, from the ink-stand stamping 10 illustrated in Figs. 1, 2, 3, 4, and 5.

11 is the gage collar which is made of somewhat smaller diameter than the saw 1 and is'preferably adapted to revolve independently of the same; This can conveniently be done by the gage collar 11 being mounted to revolve loosely on the sleeve 12 (Fig. 10) which is made with a flange 13 adapted to fit against the upper face of the saw 1 andpress the saw firmly against the face of the collar 14 of the saw spindle 2. This sleeve 12 is secured in place by the nut 15 which is screwed on to the reduced part 16 of the saw spindle 2 and fits easily inside the sleeve 12, said nut 15 being made with a flange 17 to bear against the top end of the sleeve 12 and clamp the same'firmly against the saw when the nut 15 is screwed up. The distance between the underside of the collar 17 of the nut and the top surface of the flange 13 of the sleeve 12 is slightly greater than the thickness through the eye of the gage collar 11 so that the latter can thus revolve easily on the sleeve.

'T he periphery of the flange 13 of the sleeveis preferably beveled off toward the bottom as shown and the under face of the gage collar 11 is similarly recessed and beveled off to suit so that the periphery of the gage collar extends down to, or nearly down to, the face of the saw 1 and thus affords a proper bearing for theperiphery of any stampingto be pressed against it while the flange 9 of scrap metal is being removed by the saw as aforesaid, the gage collar being held stationary or moved around slowly by the'pressure of the edge of the stamping such as 10 against it.

The face plate or table 4 is so carried that the distance between its upper surface and the underside of the saw 1 can be adjusted as may be required to suit stampin'gs of vario'us thicknesses of metal. This adjust ment can readily be efi'ected by the table top 4 having four screws 18 fixed to or projecting from its underside and passing through holes in lugs 19 formed on the under frame 7, said screws 18 having adjusting nuts 20 and lock nuts 21 so that by ad justing these nuts 20 the distance between the upper side of the table and the underside of the saw can be adjusted to a nicety and when so adjusted the table can be locked in this position by screwingup the lock nuts 21.

In using the appliance above described, the flange 9 of the stamping, such as the lnk-stand stamping 10, is preferably first reduced in size as much as possible by being clipped with shears; the stamping 10 is then laid flange downward 'on the surface plate or table 4 as in Figs. 9 and 10 and by the operator the stamping is slid along the top surface 3 of the surface plate or table 4 so that the flange 9 of the stamping passes between the underside of the saw 1 and the top of the table 4 andthe periphery of the saw 1 saws into the rim of the stamping immediately above the flange 9 (as in Figs. 9 and 10) and thus severs the portion of the flange 9 from the stamping 10 as the latter is pressed up against the gage collar 11 and meanwhlle turned around so that the saw 1 can act all around the stamping. The flange 9 will then have been removed in a piece as in Figs. 4 and 6 leaving the stamping with a perfectly-level bottom edge 22 Where the flange 9 has been sawed off. When, as is usual, the rim 23 of the stamplng 1S inclined, then the periphery of the gage collar 11 is preferably made inclined as 1n Figs. 7, 8, 9, 10, and 11 to correspond with the inclination of the stampinz's.

When the stamping (such as 24 in Fig. 11) is of such a shape that one part 25 proects below the bottom or underside of the scrap flange 9, then when the machine is for use with these stampings that portion 26 of the table on which the stamping will rest is made separate from the portion 27 of the table immediately under and around the saw and this part 26 can be independently adjusted vertically and set at the proper height for this bulged or lower portion 25 of the stamping to rest upon while the flange 9 of scrap metal rests under the saw upon the top portion 27 of the table which is immediately underneath the saw as shown for instance in Fig. 11. The'portion 26 of the table is made adjustable in height as by screws 18 and adjusting nuts 20 and lock nuts 21 similarly as above described with reference to the table top or surface plate 4.

The gage for the edge of the stamping to bear against as the flange of scrap metal is removed by the saw is preferably made in the form ofa gage collar mounted on the saw spindle 2 as above described, but it will be evident that any other equivalent arrangement may be adopted for this purpose such for instance as illustrated in Figs. 12 and 13, where the gage marked 28 is stationary and is mounted adjacent to the spindle and is made in the form of a bridge bar fixed to the top of the table at 29 with the saw 1 revolving immediately underneath it and close up to the underside of the gage 28.

My invention is illustrated as applied to the removal of an external flange from a sheet metal stamping, but it is to be understood that my invention can be similarly used for removing an internal flange from a trough section sheet metal stamping, for example an oval picture frame, the stamping having a suitable space within the frame through which the gage collar and circular saw can be inserted.

What I claim as my invention and desire to secure by Letters Patent is 1. Apparatus for removing a scrap metal flange from a hollow sheet metal stamping, comprising in combination a revolving circular saw, a surface plate fixed a short distance from one face of said saw, and a gage against which the stamping abuts, the cutting edge of the saw projecting beyond the said gage.

2. Apparatus for removing a scrap metal flange from a hollow sheet metal stamping,

comprising in combination a revolving circular saw, a surface plate fixed a short distance from one face of said saw, a circular gage collar on the other face of said saw against which the stamping abuts during the sawing process, the edge of the saw projecting beyond the periphery of said gage collar.

3. Apparatus for removing a scrap metal flange from a hollow sheet metal stamping, comprising in combination a circular saw fixedly mounted upon a revolving spindle, said saw being set a short distance above a surface plate or table so as to leave a clearance between said saw and plate or table in which clearance the flange to be removed can enter to permit of the teeth of the saw cutting through the sides of the hollow metal stamping.

4. Apparatus for removing a scrap metal flange from a hollow sheet metal stamping, comprising in combination a circular saw mounted upon a spindle, said spindle l1aving rotary motion imparted thereto, a surface plate or table fixed below said saw and having a clearance between the lower face of the saw and the surface of the plate or table, a circular gage collar loosely mounted on said spindle and adapted to frictionally revolve with the saw, said gage collar being stationary when in contact with the sides of the hollow sheet metal stamping from which the flange is to be removed.

5. Apparatus for removing a scrap metal flange from a hollow sheet metal stamping, comprising in combination a circular saw mounted upon a spindle, a pulley fixed to said spindle, an adjustable surface plate fixed below said saw and having clearance between the saw and plate, a circular gage collar loosely mounted on said spindle adapted to frictionally revolve with the saw, said collar being held against revolution when in contact with the sides of the hollow sheet metal stamping from which the flange is to be removed.

6. Apparatusfor removing a scrap metal flange from a hollow sheet metal stamping, comprising in combination a revolving circular saw mounted on a spindle, a pulley on said spindle, a surface plate adjustably positioned in relation to said saw, screws on said plate, milled and lock nuts on said screws, a gage collar mounted on said spindle on the opposite face of the saw to the adjustable plate, and a frame or bracket for supporting said spindle and surface plate.

In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.

SAMUEL TIMINGS.

Witnesses:

CHARLES BoswoRTH KETLEY, BERTHA MATILDA DEELEY.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of latents,

Washington, D. C. 

